class Test1 {
    String s;
    public static void main1(String[] args){
        Test1 test = new Test1();
        System.out.println("s="+test.s);
    }
}

class Test2 {
    public static void hello() {
        System.out.println("hello");
    }
}
class Test3 {
    public static void main2(String[] args) {
        Test2.hello();
    }
}

public class Test {
    public int aMethod(){
        int i = 0;
        i++;
        return i;
    }
    public static void main(String args[]){
        Test test = new Test();
        test.aMethod();
        int j = test.aMethod();
        System.out.println(j);
    }
}


 